Cylinder polisher



Aug. 20, 1940. H. A, HINGLE 2,212,159

, v CYLINDER POLISHER Original Filed Nov. 14, 1938 2 Shasta-Sheet l I I- 4 d Inventor l/ ff a? fl/y/a Aug. 20, 1940.

H.' A. HINGLE CYLINDER POLISHER Original Filed Nov. 14, 1938 2 Shoets-Sheot 2 A itorneys of the blocks by screws ll.

Patented Aug. 20, 1940 UNITED STATES PATENT OFFICE Application November 14, 1938, Serial No. 240,389 Renewed January 23, 1940 4 Claims.

The present invention relates to devices for polishing the walls of engine cylinders and has for its primary object to provide a plurality of polishing heads having screw means for expanding the same into friction engagement with the walls of the cylinder and also embodying means for supplying flaked graphite to the polishing heads for the purpose of supplying a coating of the graphite to the walls of the cylinder, after the same have been bored, to facilitate the starting of the motor and to provide lubrication for the pistons during the operating period immediately following the reboring job.

A further object is to provide a polishing device of this character of simple and practical construction, which is emcient and reliable in performance, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which Figure 1 is a longitudinal sectional view.

Figures 2, 3 and 4 are transverse sectional views taken on the line 22 and 3-3 and 44 respectively, of Figure 1, and

Figure 5 is a side elevational view of one of polishing blocks.

Referring now to the drawings in detail, the numeral 5 designates a screw having at one end a reduced spindle 6 for connection with a suitable operating mechanism for reciprocating and rotating the screw. Fixedly mounted on the screw, adjacent the spindle 6, is a block I having one end of a plurality of spring arms 8 secured thereto by means of screws 9. The arms 8 extend longitudinally of the screw 5 and are provided at their free ends with polishing blocks Ill. The ends of the arms are secured to the inner faces The blocks I are preferably constructed of wood and are of elongated form extending longitudinally with respect to the arms 8.

Threadedly engaged on the screw are a pair of adjusting nuts l2 and i3, the periphery of the nut l2 being engaged with the inner surface of the arms 8 and on one side of the nut is formed a wrench accommodating hub portion H.

The nut i3 is formed with a plurality of notches l5 in the periphery thereof within which are seated the arms 8 to maintain the blocks Ill against rotation relative to the screw 5. A

lock nut I 6 is threaded on the screw 5 for bearing against the nut l3 to secure the latter in adjusted position.

Fixedly secured on the lower end of the screw 5 is a block ll having a plurality of leaf springs 18 secured at one end thereto by screws l 9. The arms it have their free ends bearing fiatwise against the portion of the arms 8 attached to the blocks III, as clearly illustrated in Figure 1 of the drawings and are designed to maintain the blocks ill in fiatwise engagement with respect to the cylinder walls IQ of an engine block".

Threaded in the lower end of the screw 5 is a screw 20 having a nut 2| threadedly engaged thereon, said nut likewise being provided with notches 22 in the periphery thereof within which the spring arms it are seated. A lock nut 23 is also threaded on screw 20 for securing the nut 2| in its adjusted position thereon.

The outer surface of each of the blocks l0 are formed with longitudinally extending grooves 24 and fitted within the upper ends of each of the blocks is a funnel 25 extending through the wall of the block and communicating with the groove therein.

The funnels 25 provide means for filling the grooves 24 with flake graphite which is wiped against the walls of the cylinder to fill the pores thereof and thus provide a lubricant for the piston.

The adjusting nuts l2 and I3 expand the blocks into the desired contacting position with the cylinder walls and the adjusting nut 2| maintains the proper tension of the spring arms I8 against the blocks.

It is believed the details of construction and manner of operation of the tool will be readily understood from the foregoing without further detailed explanation.

Having thus described the invention, what I claim is- 1. A cylinder polisher comprising a screw, a plurality of spring arms fixedly secured at one end thereto, polishing blocks secured to the free ends of the arms for wiping engagement with the walls of the cylinder, a second group of spring arms secured at one end to the screw and having free ends arranged to urge the blocks into contact with the cylinder walls and independent tension adjusting means for each group of spring arms.

2. A cylinder polisher comprising a screw, a plurality of spring arms fixedly secured at one end thereto, wooden blocks secured to the free ends of the arms for wiping engagement with the for supplying a lubricant to the polishing faces.

of the blocks, means for expanding the blocks and means for adjusting the tension of said spring means.

4. A cylinder polisher comprising a plurality of polishing blocks, a plurality of spring arms having one end secured to the blocks, anchoring means for the other ends of the arms, a second group of spring arms also anchored at one end to said anchoring means and having their opposite ends free and bearing against the blocks and means for independently adjusting the tensionoi the arms to regulate pressure of the blocks against the cylinder wall.

HERBERT A. HINGLE. 

